import { addResizeListener, removeResizeListener } from "element-ui/src/utils/resize-event";

/**
 * How to use
 * <el-table height="100px" v-el-height-adaptive-table="{bottomOffset: 30}">...</el-table>
 * el-table height is must be set
 * bottomOffset: 30(default)   // The height of the table from the bottom of the page.
 */

const doResize = (el, binding, vnode) => {
    const { componentInstance: $table } = vnode;

    const { value } = binding;

    if (!$table.height) {
        throw new Error(`el-$table must set the height. Such as height='100px'`);
    }
    const bottomOffset = (value && value.bottomOffset) || 30;

    if (!$table) return;

    const height = window.innerHeight - el.getBoundingClientRect().top - bottomOffset;
    $table.layout.setHeight(height);
    $table.doLayout();
};

export default {
    bind(el, binding, vnode) {
        el.resizeListener = () => {
            doResize(el, binding, vnode);
        };
        // parameter 1 is must be "Element" type
        addResizeListener(window.document.body, el.resizeListener);
    },
    inserted(el, binding, vnode) {
        doResize(el, binding, vnode);
    },
    unbind(el) {
        removeResizeListener(window.document.body, el.resizeListener);
    }
};
